Pipe coupling



Aug. 14? 3934. K, SCHN-ER PIPE COUPLING Filed Feb. 2, 1952 il@ f?.

f WMM 55 the sleeve 6, the radiator or other unit attached PatentedAug.14,1934 V y i 1,970,059

UNITED STATES PATENT OFFICE PIPE COUPLING Karl Schtter, Linz, AustriaApplication February 2, 1932, Serial No. 590,502

In Austria February 6, 1931 1 Claim. (Cl. 285-.-120) My inventionrelates to a screw sleeve and to the connecting tube 9 can always beAdetached especially to an arrangement in which the conand removed.without difficulty, since the ends necting tube of a xed radiator,boiler or the like of the two pipes united by the coupling areterminates at a distance from the supply pipe spaced apart, and not inabutting or conically 5 and these two tubular portions are connectedinterlocking engagement as in the hitherto by a sleeve, which slides onthe connecting tube known types of pipe couplings. or on the supplypipe. To connect up the coupling, the sleeve 6 is The inventioncomprises a sleeve which loosely slid up the supply pipe 1, and screwed`on to the surrounds the thread of the supply pipe and may threadedcollar on the end of the connecting l0 be screwed on the thread of theconnecting tube tube until the upper portion of its conical surface 65until the cones of the connecting tube and sleeve 16 is a wringing t onthe conical surface 17 on closely contact each other, whereupon by meansthis collar. According to the initial spacing beof a nut which may bescrewed on the thread tween the ends of the two pipes, the conicalsurthe cones of the supply pipe and sleeve are tightly face 18 on thesupply pipe l will then be in coni' pressed one to the other. tact withor more or less spaced from the lower 70 The sleeve is provided with asingle conical portion of the conical surface 16. These two surface,which serves simultaneously as tightsurfaces, that is to say 16 and 18,are then ening surface for the cones of the connecting tube brought intowringing flt with each other by the and the supply pipe. tightening upof the nut 4 against the end of 20 In the drawing: the sleeve 6,utilizing the natural elasticity or 75 Figure 1 is a longitudinalcentral sectional give of the pipe system. It will thus be clear view ofa pipe coupling constructed and arthat the surfaces 16 and 17 arecontacted by ranged in accordance with my invention. screwing togetherthe threads 14 and 15 on the Figure 2 is an elevation of the same. parts6 and 9 respectively, while the surfaces 16 In accordance with myinvention the connectand 18 are contacted independently by the tight- 50ing tube 9 of the radiator or the like is connected ening up of the nut4 against the end of the sleeve to the supply pipe 1 by means of screwsleeve 6. 6. A tight and reliable joint is thus formed be- 'Ihe sleeve 6has only a single conical surface 16, tween two pipes spaced as to theiranda-without which is tightly pressed to the conical surface 17 theemployment of packing material of any of the connecting tube 9, if thesleeve is screwed kind, it being merely necessary for the achieve- 85 onsaid tube 9. This single surface 16 provides ment of this result thatall three conical suralso the conical tightening surface engaging thefaces provided shall be tapered in the same direccone 18 of the supplypipe 1, when the nut 4 is tion and shall have the same angle at theapex, turned. that is to say shall be of the same conicity.

The two cones 17 and 18 are parallel with the What I claim is: l 90 cone16, which enlarges outwardly. 'I'he tight- A pipe coupling comprising anexteriorly ening of the cones may be improved by inserting threadedsupply pipe having a conical surface copper sheet. on its outer en dportion, a second pipe in spaced The cone 16 may be made so as to form adouend-to-end relation to the said first pipe 'and 40 ble cone or a pairof cones one of which bearhaving an exteriorly threaded end-collar ter-95 ing on the conical `surface 17, the other on the minating in aportion with a conical surface, a conical surface 18. But the simplerform is that sleeve loose on the said rst pipe and having inwith asingle conical surface 16 to which the terior threading at its forwardend adapted to conical surfaces 17, 18 being parallel to each engage thesaid threaded collar, a conical Slllfaoe other and -to the conicalsurface 16 are pressed. on the inside of the said collar of a continuous100 'Ihe sleeve is of simple form, and suitable for length equal to atleast the sum of the lengths inexpensive methods of manufacture. of thetwo conical surfaces aforesaid plus the When the coupling is slackenedoff, the nut 4 width of the gap between the ends of the Said can be runback on the threading of the supply pipes, al1 the Said Conioal SurfaeeSbeing Smooth,

so pipe 1, after which the sieeve 6 can be slid back tapered in the samedirection, and of equal 105 on the latter without turning, since it isloosely Conicity. and a nut threaded on the Said Supply fitted thereon.pipe and adapted t0 bear against the end of the When the coupling isslackened by running said sleeve. g back the nut 4, and unscrewing andsliding back KARL SCHOTI'ER.

